But what did Abraham do? He arrived neither too soon nor too late. He mounted the ass, he rode slowly along the way. All that time he believed–he believed that God would not require Isaac of him, whereas he was willing nevertheless to sacrifice him if it was required. He believed by virtue of the absurd; for there could be no question of human calculation, and it was indeed the absurd that God who required it of him should the next instant recall the requirement. He climbed the mountain, even at the instant when the knife glittered he believed … that God would not require Isaac. He was indeed astonished at the outcome, but by a double-movement he had reached his first position, and therefore he received Isaac more gladly than the first time.
Søren Kierkegaard. Fear and Trembling, 2012. Kindle 342.